Scripts
Free Scripts for Websites
General
Hotscripts - A large collection of assorted scripts. Many are free, but not all. You can filter listings to include only free scripts.DHTML
Dynamic Drive - A large of collection of DHTML scripts free for personal and commercial use.Flash/Actionscript
Senocular - A huge collection of FLA files, all free for any use. They range from fun (glowing lightsabers) to useful (rollover tooltips).Kirupa -There are many working Flash/Actionscript files in the forum section of Kirupa, especially in the "Best of Kirupa" and the "Source/Experiments" threads.
Flash Kit - An enormous collection of Flash files in every category imaginable. The rating system is especially useful and there is a nice preview tool. There are flaws in the design of the site, sometimes causing content to jump to the bottom of the page. Be sure to scroll down to see if you've missed something.